The subject of this study is a small collection of songs known as Caryagiti, 'songs of the mystic path', or literally 'songs of the proper way of action', published by Hariprasad Sastri in 1916. These songs hold a unique place in India's spiritual and literary heritage, yet in many ways they have been imperfectly understood. This study clarifies many points that have hitherto remained obscure and provides a fresh and deeper insight into their structure and contents. The first edition was quickly sold out. The present edition is slightly revised, and the songs themselves are printed in red to distinguish them from the critical apparatus used in analysis and commentaries.